Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi 1-bilet

Axborot xavfsizligining kriptografik usullari fanidan yakuniy nazorat ishi
29-bilet
1. Feystel tarmog‘ini tushuntiring (i-round uchun)
2. RSA ochiq kalitli shifrlash algoritmi uchun quyidagi parametrlarga mos yopiq kalitni hisoblang. p=37, q=23, e=581, d=?, hamda shu parametrlar yordamida shifrlangan quyidagi shifrni oching(deshifrlang). C={506,694,563,206,148,808,461,238,563,206,808,676,563,461,808,360,808,375,702,808,702,88}, M=?
3. El-Gamal algoritmini tushuntiring va quyidagi parametrlar yordamida shifrni oching (deshifrlang)
P=659, g=335, x=423, a=112, b={402,13,77,315,100,132,489,315,164,13,100,13,77,402,164,489,347,13,77,402}, M=?
Kafedra mudiri Jo'rayev G.U.